Makes adjustments to (6)
I believe the answer is:
tweaks
'makes adjustments to' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for tweaks that I've seen before include "Makes little adjustments" , "Improves a little" , "Fine-tunes" , "Pinches and twists, perhaps nose" , "Pinches and twists, maybe a nose" .)